// ##########################################################################
// #                                                                        #
// #                              CLOUDCOMPARE                              #
// #                                                                        #
// #  This program is free software; you can redistribute it and/or modify  #
// #  it under the terms of the GNU General Public License as published by  #
// #  the Free Software Foundation; version 2 or later of the License.      #
// #                                                                        #
// #  This program is distributed in the hope that it will be useful,       #
// #  but WITHOUT ANY WARRANTY; without even the implied warranty of        #
// #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the          #
// #  GNU General Public License for more details.                          #
// #                                                                        #
// #          COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI)             #
// #                                                                        #
// ##########################################################################

#include "ccOctreeSpinBox.h"

// CCCoreLib
#include <CCMiscTools.h>

// qCC_db
#include <ccBBox.h>
#include <ccGenericPointCloud.h>
#include <ccOctree.h>

ccOctreeSpinBox::ccOctreeSpinBox(QWidget* parent /*=nullptr*/)
    : QSpinBox(parent)
    , m_octreeBoxWidth(0)
{
	setRange(0, CCCoreLib::DgmOctree::MAX_OCTREE_LEVEL);

	// we'll catch any modification of the spinbox value and update the suffix consequently
	connect(this, qOverload<int>(&ccOctreeSpinBox::valueChanged), this, &ccOctreeSpinBox::onValueChange);
}

void ccOctreeSpinBox::setCloud(ccGenericPointCloud* cloud)
{
	if (!cloud)
	{
		assert(false);
		return;
	}

	if (cloud->getOctree())
	{
		setOctree(cloud->getOctree().data());
	}
	else
	{
		ccBBox box = cloud->getOwnBB(false);
		// we make this bounding-box cubical (+0.1% growth to avoid round-off issues)
		CCCoreLib::CCMiscTools::MakeMinAndMaxCubical(box.minCorner(), box.maxCorner(), 0.001);
		m_octreeBoxWidth = box.getMaxBoxDim();
		onValueChange(value());
	}
}

void ccOctreeSpinBox::setOctree(CCCoreLib::DgmOctree* octree)
{
	if (octree)
	{
		m_octreeBoxWidth = static_cast<double>(octree->getCellSize(0));
		onValueChange(value());
	}
	else
	{
		m_octreeBoxWidth = 0;
		setSuffix(QString());
	}
}

void ccOctreeSpinBox::onValueChange(int level)
{
	if (m_octreeBoxWidth > 0)
	{
		if (level >= 0 /* && level <= CCCoreLib::DgmOctree::MAX_OCTREE_LEVEL*/)
		{
			double cs = m_octreeBoxWidth / pow(2.0, static_cast<double>(level));
			setSuffix(QString(" (grid step = %1)").arg(cs));
		}
		else
		{
			// invalid level?!
			setSuffix(QString());
		}
	}
}
